Multi-stage screening device for pulverized coal processing
By employing a screening plate and push rod structure within the screening box in a multi-stage screening device for pulverized coal processing, the problem of pulverized coal accumulation affecting screening efficiency is solved, achieving efficient multi-stage screening and recovery of unpassed pulverized coal.
Patent Information
- Application Number
- CN202520124912.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-01-20
AI Technical Summary
In existing technologies, pulverized coal tends to accumulate on the screening plate during the screening process, affecting screening efficiency.
Design a multi-stage screening device for coal powder processing. It adopts a screening plate and push rod structure in the screening box. The push rod is driven by a motor to perform reciprocating motion. The cleaning plate pushes the accumulated coal powder out of the screening plate to avoid accumulation and improve screening efficiency.
It achieves multi-stage high-efficiency screening of pulverized coal, prevents the accumulation of screening plates, ensures screening efficiency, and facilitates the recovery of pulverized coal that cannot pass through for reprocessing.
Smart Images
Figure CN223875546U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of coal powder screening, especially to a multistage screening device for coal powder processing. BACKGROUND
[0002] Coal powder refers to coal with a particle size less than 0.5 mm, which is processed from raw coal through crushing, grinding and other processes. Coal powder has a large specific surface area, and is fully in contact with air, which makes it prone to oxidation and even spontaneous combustion. The fine particles and smooth surface of coal powder make it have good fluidity, similar to the properties of a fluid. In industrial production, the fluidity of coal powder facilitates its transportation and processing. However, when the concentration of coal powder in air reaches a certain range (usually between 20 grams and 2000 grams per cubic meter), and it encounters a fire source or high temperature, it may explode. This is because the mixture of coal powder and air at this concentration is flammable and explosive. Once it encounters a fire source, the reaction is rapid and the energy release is intense, which can produce strong impact and destructive power. Therefore, effective explosion prevention measures must be taken in places where coal powder is processed, stored, and used, such as installing explosion-proof electrical equipment and setting up ventilation devices to reduce the concentration of coal powder. In thermal power generation, coal powder is widely used as fuel. By spraying coal powder into the boiler furnace, a large amount of heat energy is released to heat water into high-temperature and high-pressure steam, which in turn drives the steam turbine to rotate and generate electricity. In the steel smelting process, coal powder is an important reducing agent and fuel. In blast furnace ironmaking, coal powder is sprayed into the blast furnace to provide heat as fuel and to reduce iron ore to iron by reacting carbon in coal powder with oxygen in iron ore, thereby promoting the steel production process and improving production efficiency and product quality. Many industrial processes require a large amount of heat energy, and industrial boilers often use coal powder as fuel.
[0003] In the prior art, after coal powder is produced and processed, it needs to be screened to separate coal powder of appropriate size for use. At this time, the coal powder is fed into the screening device, and the screening plate inside the screening device screens out coal powder of appropriate size. Coal powder that does not meet the size requirements is crushed and screened again.
[0004] However, when coal powder is screened through the screening plate, the coal powder that cannot pass through the screening plate tends to accumulate on the screening plate, which can affect the subsequent screening of coal powder and reduce the screening efficiency. UTILITY MODEL CONTENT
[0005] The utility model aims to provide a multistage screening device for coal powder processing, which solves the problem of coal powder accumulating on the screening plate affecting the screening efficiency in the prior art.
[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:
[0007] The utility model discloses a multi -stage screening device for coal powder processing, including screening box, the inside fixed connection of screening box has a plurality of screening board through the installation mechanism, the side fixed connection of screening box has the mounting panel, the bottom fixed connection of mounting panel has the motor, the side of screening box is equipped with a plurality of push -rod, and the reciprocating mechanism is equipped between a plurality of push -rod and motor, and the one end fixed connection of push -rod has the cleaning plate, and the both sides of screening box all fixed connection has a plurality of collection channel, and the both sides below of adjacent screening board are located to collection channel.
[0008] Preferably, the installation mechanism includes a plurality of installation slots opened on both sides of the screening box, and both ends of the screening board are located inside the adjacent installation slot.
[0009] Preferably, the top of the installation slot is rotatably connected with an anti-moving block through a torsional spring shaft.
[0010] Preferably, the reciprocating mechanism includes a plurality of U-shaped transmission rods fixedly connected to the surface of the output shaft of the motor, a rotating sleeve is sleeved on the surface of the transmission rod, an intermediate rod is fixedly connected to the surface of the rotating sleeve, and one end of the intermediate rod is rotatably connected with one end of the adjacent push rod.
[0011] Preferably, a plurality of limiting cylinders are fixedly connected to the surface of the screening box, and the push rod is arranged in the adjacent limiting cylinder.
[0012] Preferably, both ends of the collection channel are arranged on the surface of the screening box, and a plurality of accommodation boxes are fixedly connected to the side of the screening box.
[0013] The utility model has the following beneficial effects:
[0014] When screening the coal powder, the multi-stage screening can be carried out through a plurality of screening boards distributed upwards and downwards, and the motor is started during the screening, so that the cleaning plate is reciprocally pushed on the screening board through the push rod, the accumulated coal powder is cleaned out of the screening board, and the screening of the screening board is more efficient, and the screening efficiency of the screening board is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.
[0016] Figure 1 It is the structural schematic diagram of the utility model;
[0017] Figure 2 It is Figure 1 the side schematic diagram.
[0018] Figure 3 for Figure 1 schematic diagram of the inside of the screening box;
[0019] Figure 4 for Figure 3 schematic diagram of the side of one of the screening plates;
[0020] Figure 5 for Figure 3 schematic diagram of the side of the mounting mechanism.
[0021] In the figure: 1, screening box; 2, mounting mechanism; 3, screening plate; 4, mounting plate; 5, motor; 6, push rod; 7, reciprocating mechanism; 8, cleaning plate; 9, collection channel; 10, storage box; 201, mounting slot; 202, anti-moving block; 203, torsional spring rotating shaft; 701, transmission rod; 702, rotating sleeve; 703, intermediate rod; 704, limiting cylinder. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.
[0023] With reference to Figures 1-5The utility model provides a kind of multi-stage screening device for coal processing, including screening box 1, screening box 1 is prior art, and a plurality of screening plates 3 are fixedly connected in the inside of screening box 1 by mounting mechanism 2, the screen size on these screening plates 3 is different, need be distributed according to up and down to meet multi-stage screening of coal powder, when needing to screen coal powder, the multi-stage screening of coal powder can be carried out by a plurality of screening plates 3 in the inside of screening box 1, and the coal powder after screening can be collected from the bottom in the inside of screening box 1, after screening for a period of time, the plate of the side of screening box 1 can be opened, then mounting mechanism 2 is opened and screening plate 3 is taken out to replace, after replacing new screening plate 3, continue to carry out the multi-stage screening of coal powder, mounting plate 4 is fixedly connected on the side of screening box 1, motor 5 is fixedly connected on the bottom of mounting plate 4, a plurality of push rods 6 are provided on the side of screening box 1, and reciprocating mechanism 7 is arranged between a plurality of push rods 6 and motor 5, when screening coal powder, motor 5 needs to be started, and motor 5 can drive push rod 6 to reciprocate after being started, and the reciprocation of push rod 6 can reciprocally push the coal powder on screening plate 3, which can improve the screening efficiency of coal powder, and the coal powder that cannot be screened can be pushed out of screening plate 3 from the side of screening plate 3, so that the screening efficiency is not affected, one end of push rod 6 is fixedly connected with cleaning plate 8, cleaning plate 8 can conveniently push the coal powder accumulated on the surface of screening plate 3 away, to ensure the convenience of cleaning and screening, a plurality of collection channels 9 are fixedly connected on the both sides of screening box 1, and the collection channel 9 is located below the both sides of adjacent screening plate 3, when the coal powder is pushed by cleaning plate 8, the reciprocation of cleaning plate 8 can push the coal powder out of the both sides of screening plate 3, and then the coal powder enters two collection channels 9, so that the coal powder is not wasted and the coal powder on different classification screening plates 3 is collected separately for easy re-breaking.
[0024] Further, the mounting mechanism 2 includes a plurality of mounting grooves 201 opened on the both sides of the screening box 1, and the both ends of the screening plate 3 are located in the adjacent mounting grooves 201. When a new screening plate 3 needs to be installed, the plate on the side of the screening box 1 needs to be opened first, then the screening plate 3 is taken out from the mounting groove 201, and then the new screening plate 3 is sent into the corresponding mounting groove 201 from top to bottom according to the classification, and the side plate of the screening box 1 is closed to continue the multi-stage screening and processing of the coal powder.
[0025] Further, the top of the mounting groove 201 is rotatably connected with the anti-moving block 202 through the torsion spring rotating shaft 203. When the screening plate 3 is sent into and out of the screening box 1, the anti-moving block 202 needs to be rotated first, so that the anti-moving block 202 does not affect the entry and exit of the screening plate 3 at both ends into the mounting groove 201. After the new screening plate 3 is inserted into the mounting groove 201, the restriction on the anti-moving block 202 can be released, and the anti-moving block 202 can be reset by the elastic force of the torsion spring rotating shaft 203, so that the screening plate 3 can be blocked all the time, so that the screening plate 3 can stably screen the coal powder and will not affect the stability of the coal powder screening.
[0026] Further, the reciprocating mechanism 7 includes a plurality of U-shaped transmission rods 701 fixedly connected to the surface of the output shaft of the motor 5. The surface of the transmission rod 701 is sleeved with a rotating sleeve 702, and the surface of the rotating sleeve 702 is fixedly connected with an intermediate rod 703. One end of the intermediate rod 703 is rotatably connected with one end of the adjacent push rod 6. When it is needed to make the push rod 6 reciprocate, the motor 5 needs to be started first. The motor 5 can drive a plurality of transmission rods 701 to rotate through the output shaft, and the rotation of the transmission rod 701 can drive the intermediate rod 703 to pull and push the push rod 6. In this process, the position of the intermediate rod 703 will always change, so as to facilitate the transmission rod 701 to drive the push rod 6 to reciprocate, and ensure that the push rod 6 drives the cleaning plate 8 to clean the screening plate 3.
[0027] Further, the surface of the screening box 1 is fixedly connected with a plurality of limiting cylinders 704, and the push rod 6 penetrates the inside of adjacent limiting cylinders 704. When the push rod 6 reciprocates, the limiting cylinder 704 can ensure the stability of the reciprocating track of the push rod 6, and the push rod 6 will not easily be inclined, so that the cleaning plate 8 on the push rod 6 can always reciprocate on the same track, thereby ensuring the cleaning effect of the coal powder on the screening plate 3.
[0028] Further, both ends of the collection channel 9 penetrate the surface of the screening box 1, and the side surface of the screening box 1 is fixedly connected with a plurality of accommodation boxes 10. When the coal powder is pushed out of the screening plate 3 by the cleaning plate 8, the coal powder will enter the adjacent collection channel 9, and then slide into the accommodation box 10 through the inclined bottom. The coal powder at different heights is collected and reprocessed.
[0029] In summary:
[0030] When the coal powder is subjected to multi-stage screening, the coal powder needs to be fed from the feeding port at the top of the screening box 1 first, and then the coal powder falls by gravity, and then the motor 5 on the starting installation plate 4 is started, the output shaft of the motor 5 can drive a plurality of transmission rods 701 to rotate, the transmission rods 701 can drive the middle rod 703 through the rotating sleeve 702 on the surface in the process of rotation, so that the middle rod 703 can conveniently drive the push rod 6 to reciprocate, and the push rod 6 can be limited by the limiting cylinder 704 when reciprocating, so as to prevent the push rod 6 from being skewed when reciprocating, so as to ensure that the push rod 6 can move along a fixed track, so that the cleaning plate 8 can better clean the surface of the screening plate 3, so that the coal powder that cannot pass through the screening plate 3 can be swept out of the screening plate 3, so that the coal powder enters the adjacent collecting channel 9, and then exits from the collecting channel 9 into the nearest containing box 10, thereby conveniently subjecting the coal powder to multi-stage screening, and when screening for a long time, the screening plate 3 is easy to be blocked, which affects the screening efficiency, so the screening plate 3 needs to be replaced after a period of time, and when replacing, the side panel of the screening box 1 needs to be opened first, and then the screening plate 3 is taken out from the inside of the screening box 1, and when taking out, the anti-moving block 202 needs to be rotated first so that the installation groove 201 is smooth, and then the new screening plate 3 is reinstalled after the screening plate 3 is taken out, and after the screening plate 3 is installed, the anti-moving block 202 is released, and the anti-moving block 202 can be reset by the elastic force of the torsion spring shaft 203, so as to limit the screening plate 3, prevent the screening plate 3 from shaking during use, ensure the stability of the screening plate 3, and push the coal powder when the cleaning plate 8 pushes the coal powder out of the screening plate 3, so that the coal powder moves on the screening plate 3, improves the screening effect, and through the above structure, the coal powder accumulated on the screening plate 3 can be pushed away when the coal powder is screened, so as to prevent the coal powder from accumulating and affecting the screening of the coal powder by the screening plate 3, and the coal powder can be recycled to ensure that the coal powder does not accumulate on the screening plate 3, ensure the efficiency of the coal powder screening, and conveniently recycle the coal powder that cannot pass through the screening for reprocessing.
[0031] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection required by the present application is defined by the appended claims and their equivalents.
Claims
1. A multi-stage screening device for coal processing, comprising a screening box (1), characterized in that, The inside of the screening box (1) is fixedly connected with several screening plates (3) through a mounting mechanism (2), the side of the screening box (1) is fixedly connected with a mounting plate (4), the bottom of the mounting plate (4) is fixedly connected with a motor (5), the side of the screening box (1) is provided with several push rods (6), and the push rods (6) and the motor (5) are provided with a reciprocating mechanism (7), one end of the push rod (6) is fixedly connected with a cleaning plate (8), and the two sides of the screening box (1) are fixedly connected with several collecting channels (9), and the collecting channels (9) are located below the two sides of the adjacent screening plates (3).
2. The multi-stage screening device for processing coal fines according to claim 1, characterized in that, The mounting mechanism (2) comprises a plurality of mounting grooves (201) formed on the two sides of the screening box (1), and the two ends of the screening plate (3) are located in the inside of the adjacent mounting grooves (201).
3. The multi-stage screening device for processing coal fines according to claim 2, characterized in that, The top of the mounting groove (201) is rotatably connected with a anti-moving block (202) through a torsional spring rotating shaft (203).
4. The multi-stage screening device for processing coal fines according to claim 1, wherein, The reciprocating mechanism (7) comprises a plurality of U-shaped transmission rods (701) fixedly connected to the output shaft surface of the motor (5), a rotating sleeve (702) is sleeved on the surface of the transmission rod (701), the surface of the rotating sleeve (702) is fixedly connected with an intermediate rod (703), and one end of the intermediate rod (703) is rotatably connected with one end of the adjacent push rod (6).
5. The multi-stage screening device for processing coal fines according to claim 1, wherein, The surface of the screening box (1) is fixedly connected with several limiting barrels (704), and the push rod (6) is provided in the inside of the adjacent limiting barrels (704).
6. The multi-stage screening device for processing coal fines according to claim 1, wherein, The two ends of the collecting channel (9) are provided on the surface of the screening box (1), and the side of the screening box (1) is fixedly connected with several containing boxes (10).